A Measure of Sound

Today in class I was the measuring sound lab with Amalia and Le-Jayah. In it, we had two experiments to do. The first part of the lab was to make a device that would measure sound. The second part was to build orur own speaker. We had enough time to do the first one though.
Experiment One:
There was an attached document with a diagram and instructions on how to build the device. We followed them, and ended up with a battery with copper wire attached to both ends, with the middle wound around an iron nail. The nail was held onto a magnetic sound tracker which was attached to the computer. The Computer had a built in lab for this, that would track the magnetic feild per wind. We had to test eight different times. Each time with three more winds then the time before it. The winds we tested at were: zero, three, six, nine, twelve, fifteen, eighteen, and twenty-one. We only got up to eighteen, because we had to keep starting over due to technical diffuculties.
Anyway, the more the wire was winded around the nail, the higher the magnetic feild was. The line on the graph went up.
At the end of the lab, we were supposed to save our graph that we made using the points from our sound measurements, and then print it out. But we forgot to, so I have no data to support what we did.